hobson



(No Model.) J. W. HOBSON.

LAWN MOWER. No. 275,338. Patented Apr. 3', 1883'.

INVBN TOR ATTORNEY v UNITED STATES PATENT OFF CE.

JOSEPH w. HOBSON, on NEW YORK, n. Y., ASSIGNOR TO CARR & noeson, (LIMITED,) or SAME PLACE.

LAWN M OWE R.

SPECIFICATION forming part of Letters Patent No. 275,338, dated April 3, 1883.

Application filed November 21, 1882.

To all whom it may concern Be it known that I, JOSEPH W. HoBsoN, of the city, county, and State of New York, have invented a new and useful Improvement in Lawn-Mowers; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying sheet of drawings, forming part of this specification.

This invention is in the nature of an improvement in lawn-mowers; and the invention is a lawn-mower, with the cutter thereof, consisting of two or more blades united by slotting them in the direction of their length and inserting the slotted portion of one blade into the slotted portion of the other or others, in combination with suitable journals united thereto in any desirable manner.

In the accompanying sheet of drawings, Figure 1 is a plan or top view of my improved cutter and lawn-mower. Fig. 2 is a cross-section taken in line :0 00, Fig. 1. Figs. 3 and at are plan views of knives before they are united, showing slots. Fig. 5 is a perspective view of slotted journal. Fig. 6 is a cross-section, showing cutter with more than two leaves. Figs. 7 and 9 are plan views of cutterblanks slotted beyond their centers. Fig. 8 is a plan of cutter-blank, slotted at each end. Fig. 10 is a plan of cutter-blank with journals forged thereon.

Similar letters of reference indicate like parts in the several figures.

The revolving cutters of lawn-mowers heretofore made have employed cast or malleable iron in their construction. The cast-iron being brittle and the malleable iron expensive as to material and fitting, neither of them are particularl y well suited for the purpose. Besides, such construction renders the cutter unnecessarily heavy. This cast-iron has been employed in some instances in the shape of spi-v (No model.)

since it cannot be drawn from the mold excepting when patterns of peculiar construction are used. All of the aforesaid cutters are objectionable because either of their weight, brittleness, expense of manufacture, or lack of stiii'ness, and in every instance the steel blade has necessarily been riveted, bolted, or keyed to the cast or other metal.

In my cutter, which is the subject of the present invention, these objections are obviated, and a strong, light, and easily-made cutter is produced, and one that can be sharpened or ground down to any reasonable extent, it being made of steel throughout, whereas in the cutters consisting of steel knives combined with cast or malleable iron the knives will speedily become, by sharpening, reduced to such an extent as to require their renewal.

In making my cutter I take two or more, plates, of steel or any other suitable material A of the required thickness and length, and form in each plate a slot, a, extending in the direction of its length? The plates A having been bent to the usual spiral curve, (either before or after they are slotted,) the slotted part of one plate is inserted into the slotted portion of another plate or plates, so that the plates may be at right angles or at some other convenient angle to each other, in which position they are held in any suitable manner. Journals B may be forged on the ends of the plates A or be riveted thereon, or the journals may be made with angular openings 0 in one of their ends to correspond with the angular positions of the ends of the plates, and these journals may be shrunk onto the ends of the plates or riveted to the ends of the blades of the cutter Now, with the exception of sharpening and fitting the journal-bearings my cutter is completed and ready to be attached to the other portions of the lawn-mower.

The cutter is caused to revolve by the usual rollers, wheels or gears, endless chain or band, or otherwise, as may be desired.

This form of cutter may also be employed in the construction of hay and chaff cutters and other agricultural machines, and the economy arising from its manufacture will be apparent when the small number of its parts and the simplicity of its construction are considered.

two or more slotted plates fixed at suitable angles to each other, in combination with necessary journals, wherein or upon are received and fixed the ends of the plates, and whereby the cutter may revolve, as and for the purpose described.

J. \V. HOBSON.

Witnesses:

G. M. PLYMPTON, JNO. N BRUNs. 

